5V external Power for smart thermostat radiator valve

Does anyone know, if we can use ext. 5V1A as Power for the smart thermostat radiator valves?

As the 2xAA cells only provide 3V I am in fear of damaging the device with ext. 5V. I'm fine with hacking a cable into the thermostat, but I don't want to kill it completly with too much voltage.

I am asking because I know devices (f.e. arduino) which have inputs with a max voltage of 3.3V and are destroyed with 5V.


  • Hello madejackson,

    The Smart Radiator Thermostat is designed to operate on 2xAA batteries exclusively.

    We would recommend not to try it as this migh void your warranty.



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